if (DEFINED ENV{CUDA_PATH_V8_0})
    message("CUDA_PATH_V8_0 is defined")
    message($ENV{CUDA_PATH_V8_0})
else()
    message("CUDA_PATH_V8_0 is NOT defined")
    
endif()
include_directories($ENV{CUDA_PATH_V8_0}/include)
link_directories($ENV{CUDA_PATH_V8_0}/lib/x64)